see how right now!
You add decimals by writing it like a "simple" addition
problem with whole numbers. (As seen below.) Remember
to line up the decimals.
12.05 +7.72
What do you think that equals? The answer is 19.77.
While adding, you must remember to carry out
the usual procedure. How do you subtract decimals? see how to now!
You subtract decimals by setting it up like a usual
subtraction problem. Let's make up a new problem.
Remember you may need to add annex zeros, or extra
zeros, to make the the numbers equal in length.
81.8 - 6.71
Did you remember to change 81.8 to 81.80? If you didn't
you might have gotton the same answer, but it is much easier
to insert annex zeros. The answer is 75.09.
Adding and Subtracting Decimals
Watch this awesome video!How Do You Add Decimals?
see how right now!You add decimals by writing it like a "simple" addition
problem with whole numbers. (As seen below.) Remember
to line up the decimals.
12.05
+7.72
What do you think that equals? The answer is 19.77.
While adding, you must remember to carry out
the usual procedure.
How do you subtract decimals?
see how to now!
You subtract decimals by setting it up like a usual
subtraction problem. Let's make up a new problem.
Remember you may need to add annex zeros, or extra
zeros, to make the the numbers equal in length.
81.8
- 6.71
Did you remember to change 81.8 to 81.80? If you didn't
you might have gotton the same answer, but it is much easier
to insert annex zeros. The answer is 75.09.